Photo Gallery: Drone Worries in Germany

Advances in drone technology, largely driven by a creative DIY community, are making them smaller and cheaper. "Just eight years ago, most systems went for more than €100,000 ($130,000)," says Heinrich Warmers, a professor of electrical engineering at the Bremen University of Applied Sciences. "But, today, I can buy the entire control technology, including a compass and GPS, on a single chip for only €10."